CATS (1 of 3) (image) NASA/Johnson Space Center Caption Roughly the size of a refrigerator, CATS will use the same two laser wavelengths on NASA's CALIPSO mission, 1064 and 532 nanometers, and it will incorporate a third laser wavelength -- 355 nanometers. This will provide more detailed information about the particles in Earth's atmosphere. Credit NASA Usage Restrictions credit to NASA Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.